Spinning nozzle fastener



H. HENCH SPINNING NOZZLE FASTENER Jan. 24, 1967 4 Sheets-Sheet 1 FiledApril 22, 1965 FIG-7 INVENTOR Hons Hench ATTOR N EY Jan. 24, 1967 H. HENCH 3, 4

SPINNING NOZZLE FA STENER 4 Sheets-Sheet 2 Filed April 22, 1965 v I v 13FIG.3

INVENTOR. Hons Hench Jan. 24, 1967 H. HENCH 3,299,471

. SPINNiNG NOZZLE FASTENER Filed April 22, 1965 4 Sheets-Sheet s ATTO RNEY Jan. 24, 1967 H. HENCH SPINNING NOZZLE FASTENER Filed April 22. 19654 Sheets-Sheet 7 a 7 I, R F n 3 w w m. v f 1! 3 INVENTOR Hons HenchATTORNEY United States Patent O "ice 3,299,471 SPINNING NOZZLE FASTENERHans Hench, Aschaifstrasse 75, Aschaifenburg, Germany Filed Apr. 22,1365, Ser. No. 449,952 Claims priority, application Germany, Apr. 27,1964, H 52,519; Oct. 30, 1964, H 54,181 8 Claims. (Cl. 18-8) Thisinvention relates to a spinning device for the manufacture of filamentsfrom synthetic materials. In particular, this invention relates tospinning devices comprising improved means for fastening the spinningnozzle to the feed material source.

It is an object of this invention to provide a spinning device whereinthe spinning nozzle can be installed and removed horizontally from thefront or service side of the spinning equipment.

It is another object of this invention to provide a spinning devicewherein the spinning nozzle can be installed and removed more quicklywithout disturbing air blower ducts beneath the spinning nozzle so thatproduction stop-page due to breakdown requiring an exchange of spinningnozzles can be greatly reduced.

It is another object of this invention to provide a spinning devicewherein the spinning nozzles are fastened to the feed material source bybeing wedge-d thereagainst by means of either wedges or cam surfacespressing against the underside of the spinning nozzle.

It is another object of this invention to provide a spinning device forthe manufacture of filaments from synthetic materials comprising aspinning nozzle having an inlet opening for the receipt of feedmaterial, a nozzle block having an outlet opening communicating withsaid inlet opening for supplying feed material, a mounting plateattached to said nozzle block with said spinning nozzle locatedtherebetween, and either at least two wedges or at least two rotatableshafts having cam surfaces supported by said mounting plate for bearingagainst the spinning nozzle for wedging the spinning nozzle in placeagainst the nozzle block.

In the drawings where like reference numerals denote same or equivalentparts throughout,

FIG. 1 shows the front view of a spinning device of this invention;

FIG. 2 shows a section IIII of FIG. 1;

FIG. 3 shows a section IIIIII of FIG. 1;

FIG. 4 shows a longitudinal section through an alternative constructionof the spinning device of this invention;

FIG. 5 shows a top view of the mounting plate shown in edge view in FIG.4;

FIG. 6 shows a section along the line VI--VI of FIG. 4;

FIG. 7 shows a section along line VII-VII of FIG. 5;

FIG. 8 shows a section along line VIII-VIII of FIG. 5.

Referring to the form of the device shown in FIGS. 1, 2 and 3, thenozzle housing is preferably of welded construction. The nozzle housingis formed of a nozzle block 1 and a nozzle block 2 which are weldedtogether in the middle with the interposition of aplate 3. At the ends,plates 4 and 5 are also welded on. The shape of the blocks defines anaccess opening towards the service side as can be seen from theindividual views.

The threads emerging fromnozzles 6 and 7 are discharged through anopening 8 in the nozzle block which provides support surfaces 10 and 10for the wedges 9.

At the ends 11, the spinning nozzles are provided with recesses 12 and12. The upper surfaces of these recesses 13 and 13 are inclined at aslight downward angle from the service side to the rear, opposite sideof the device.

3,299,47 1 Patented Jan. 24, 1967 The wedges 9 are shorter than thewidth of the spinning nozzle and the clearances 12 and 12', and theupper surface of each wedge is slightly rounded lengthwise or curved inthe longitudinal direction. This provides a linear area of contactbetween the wedge and the spinning nozzle, preventing a large amount offriction against the nozzles 6 and 7 and preventing jamming of thewedges in the respective recesses.

The nozzles 6 and 7, which in other respects, consist in a known mannerof several parts and inserts, are not a part of invention'and aretherefore not described in greater detail.

The hex head :bolts 17, having a recess in the heads of hexagonalcross-section, extend through a longitudinal passageway through eachwedge and are secured in the passageway by a snap ring 18.

According to the idea of the invention, the assembly bolts secured bysnap rings do not, as in previous devices, project directly through theheated nozzle plate, but rather project through the wedges. These wedgesdo not, however, have a large surface in contact with each of theinclined surfaces of the spinning nozzle, for they are slightly curvedin the longitudinal direction so that between the two surfaces thereresults a linear contact area transverse with respect to the wedges.

According to this invention, the spinning nozzle is fastened by means ofonly two bolts. Therefore, the heat loss from the spinning nozzle ismuch smaller than in previous devices which employed eight bolts thathad to be driven in from below. In addition, it is possi-ble to useweaker bolts because they are exposed to less heat than those employedin previous devices.

Gaskets 14 which are gas-filled annular rings of a highly heat-resistantmaterial are positioned between the spinning nozzle and the nozzle blocksurrounding the opening therethrough. Annular recess seats for the ringcan be provided. The gasket prevents escape of material passing throughthe openings.

Referring to FIGS. 4 through 8, an embodiment of the device of thisinvention is shown wherein there are two shafts provide-d with camssupported in such a way that during their rotation the nozzle is pressedby the cams against the feed insert.

The nozzle block manufactured of high temperature structural steel isdesignated by 21, the feed insert is designated by 22, and the'drawerdike spinning nozzle insert to be pushed as a whole in thedirection of the arrow is designated by 23. This insert consists of anupper part 24 and a lower part 25 between which are arranged thedistributor 26, the filter 27, the strainer 28, the final filter 29, andthe spinning nozzle orifice block 30 The upper part 24 and the lowerpart 25 are connected together. In the nozzle block 21, tapholes 31 areprovided by which mounting plate 32 can be fastener with bolts 33. Thisfastening occurs only once, when the spinning apparatus is initiallyassembled. The bolts 33 need not be removed later, since the spinningnozzle 23 can be replaced in a simpler manner, as shall be shown later.

Two shafts 34 are pivoted in the space 32' defined by the mounting plate32. In FIG. 5 one shaft is omitted; As can be seen, the shafts arearranged in sucha way that they run parallel to the longitudinal edgesof the nozzle 23. a

The ends of the shafts 34 are provided with a square or hexagonal tip34- In this manner the shafts can be turned with a single open-end orbox-end wrench and several cams press against the nozzle simultaneously.On each shaft are attached two cams 35, the effective curved surfaces ofwhich have the shape of a spiral. Each shaft 34 rests on three supportpoints. The support points consist of bearing 36, which are removablyset into circular recesses 37 of the mounting plate 32. Here, thearrangement is such that the bearings 36 and the shafts 34, with theexception of the shaft ends 34, are contained within the mounting plate32. Thus small construction dimensions are attained. Furthermore, aconsiderably larger number of spinning orifices 38 can be incorporatedin the spinning nozzle 30. Removable wearing plates 39 which providebearing surfaces for the cams 35, are inserted in the lower part 25 ofthe spinning nozzle.

If the spinning-nozzle insert 23 is pushed in from the front, i.e., fromthe direction of the arrow, it is guided like a drawer by the contactsurfaces 40 of the nozzle block 1, said contact surfaces assuring thetransfer of heat. If in FIG. 6 the left shaft 34 is turned to the leftand the right shaft is turned to the right, the cams 35 lift thespinning nozzle insert 23 and press its upper surface against the nozzleblock 21, and therefore the insert gas-filled gaskets are pressedtowards the opening 41 of the feed insert 22. From the service side ofthe device, the spinning nozzle 23 can be covered with a plate 42 ofsilumin, so that optimum temperature conditions prevail with the nozzleblock 21. The nozzles are heated in the known manner with biphenyl. Ifspinning nozzl 23 is to be changed, only the shafts 34 must be turned,now in the opposite direction, and the insert can be taken outhorizontally and a new one can be inserted.

According to another characteristic of this embodiment of the invention,the effective curved surfaces of the cams have the shape of a spiralbeginningat th surface of the shaft. This construction is preferredbecause at the beginning of the shaft and cam rotation, the requiredpower is small. If, as furthermore proposed in the invention, each shaftis supported at three points, and if one cam is placed on the shaftbetween each pair of support points, a favorable power distribution canbe achieved in the arrangement. The above-mentioned drawer-like guidanceof the nozzle assures in connection with simultaneous and uniformcontact pressure of the nozzle by means of the cams, an evenlydistributed transfer of heat from the nozzle block to the spinningnozzle.

Obviously many modifications and variations of the invention ashereinabove set forth can be made without departing from the essence andscope thereof, and only such limitations should be applied as areindicated in the appended claims.

Iclaim:

1. A spinning device for the manufacture of filaments from syntheticmaterials comprising: a spinning nozzle having at least one filamentemission orifice; a nozzle block having walls defining a. hollowinterior and having in said walls a filament discharge opening and aspinning nozzle insertion opening; said spinning nozzle situated in saidinterior with each of its orifices facing said discharge opening; andmeans to wedge said spinning nozzle in a fixed position relative to saidnozzle block; said insertion opening having dimensions larger than themaximum dimensions of said spinning nozzle in cross sectional planesfacing the insertion opening; said discharge opening displaced from saidinsertion opening.

2. A spinning device for the manufacture of filaments from syntheticmaterials comprising: a spinning nozzle having at least one filamentemission orifice; a nozzle block having walls defining a hollow interiorand having in said walls a filament discharge opening and a spinningnozzle insertion opening; said spinning nozzle situated in said interiorwith each of its orifices facing said discharge opening; said insertionopening having dimensions larger than the maximum dimensions of saidspinning nozzle in cross sectional planes facing the insertion opening;said discharge opening displaced from said insertion opening;

at least two wedges supported by said nozzle block and tightening meansto cause said wedges to bear against the underside of the spinningnozzle to hold the HOZZIEIIII a fixed position relative to said nozzleblock; said device having a service side for access to said insertionopening, wedges and tightening means.

3. The spinning device of claim 2, said tightening means comprising: abolt extending longitudinally from said service side through apassageway in each wedge, an annular seat in said passageway forsupporting the head of the bolt, a snap-ring mean-s retaining said boltin position in said passageway, threaded holes in said nozzle blockcooperating with the threads of said wedge bolts, whereby the wedges canbe forced into and out of a wedging relationship with the spinningnozzle by turning the wedge bolts in the respective directions.

4. The spinning device of claim 2 wherein an annular resilient seal isprovided between said spinning nozzle and said nozzle block andsurrounding the junction of synthetic material feeding channels innozzle block and nozzle.

5. The spinning device of claim 2 wherein the underside of the spinningnozzle is inclined downward from the service side to the rear side ofthe device, and wherein the upper surface of each wedge is convexlycurved in the longitudinal direction and is shorter in length than thewidth of the spinning nozzle from the service side to the rear sidethereof.

6. A spinning device as claimed in claim 1, said means to wedgecomprising: a mounting plate and partially covering said filamentdischarge opening attached to said nozzle block, and at least tworotatable shafts supported by said mounting plate, said shafts beingprovided with cam surfaces for bearing against the spinning nozzle forwedging the spinning nozzle in place against the nozzle block.

7. A spinning device as claimed in claim 6, said insertion opening andsaid filament discharge opening both having an axis, that of saidinsertion opening being defined by the linear direction of movement ofthe spinning nozzle during insertion and withdrawal, and that of saiddischarge opening being defined by the linear direction of filamentspassing through said emission orifice; the amount of displacement ofsaid discharge opening from said insertion opening being such that theaxis of the in sertion opening is approximately perpendicular to theaxis of the discharge opening.

8. A spinning device as claimed in claim 2, said insertion opening andsaid filament discharge opening both having an axis, that of saidinsertion opening being defined by the linear direction of movement ofthe spinning nozzle during insertion and withdrawal, and that of saiddischarge opening being defined by the linear direction of filamentspassing through said emission orifice; the amount of displacement ofsaid discharge opening from said insertion opening being such that theaxis of the insertion opening is approximately perpendicular to the axisof the discharge opening.

References Cited by the Examiner UNITED STATES PATENTS 1,947,202 2/1934Homier 1812 2,045,722 6/1936 Pierrat et al. 18-8 2,217,743 10/1940Greenwadt 188 2,803,851 8/1957 Baunlich et al 188 3,068,515 12/1962Thomas l8l2 3,203,047 8/1965 Fleming et al. 18-12 X 3,229,330 1/1966Ferrier et al l88 WILLIAM J. STEPHENSON, Primary Examiner,

2. A SPINNING DEVICE FOR THE MANUFACTURE OF FILAMENTS FROM SYNTHETICMATERIALS COMPRISING: A SPINNING NOZZLE HAVING AT LEAST ONE FILAMENTEMISSION ORIFICES A NOZZLE BLOCK HAVING WALLS DEFINING A HOLLOW INTERIORAND HAVING IN SAID WALLS A FILAMENT DISCHARGE OPENING AND A SPINNINGNOZZLE INSERTION OPENING; SAID SPINNING NOZZLE SITUATED IN SAID INTERIORWITH EACH OF ITS SURFACES FACING SAID DISCHARGE OPENING; SAID INSERTIONOPENING HAVING DEMENSIONS LARGER THAN THE MAXIMUM DIMENSIONS OF SAIDSPINNING NOZZLE IN CROSS SECTIONAL PLANES FACING THE INSERTION OPENING;SAID DISCHARGES OPENING DISPLACED FROM SAID INSERTION OPENING; AT LEASTTWO WEDGES SUPPORTED BY SAID NOZZLE BLOCK AND TIGHTENING MEANS TO CAUSESAID WEDGES TO BEAR AGAINST THE UNDERSIDE OF THE SPINNING NOZZLE TO HOLDTHE NOZZLE IN A FIXED POSITION RELATIVE TO SAID NOZZLE BLOCK; SAIDDEVICE HAVING A SERVICE SIDE FOR ACCESS TO SAID INSERTION OPENING,WEDGES AND TIGHTENING MEANS.